From bulbapedia.net: The Cave of Origin is where Wallace can be found debating where Rayquaza is located, until the player gives him a hint that it is at Sky Pillar.
ANSWER You have to battle Archie and Maxie and then go to the cave of Origins
it s in the final stages in the game you find team Aqua and the stolen sub beat Archie and the go to Sootoplis and talk to Steven
The cave of Origins must rest in peace. (there's no way in)
It may be on the ground in the cave of origins, in Slaport city.
Kyorge does not appear in Shoal Cave. In Pokemon Sapphire Kyogre appears in the Cave of Origins as part of the story. In Pokemon Emerald Kyogre appears in the Marine Cave after defeating the Elite Four.
In front of the GYM.
The Cave of Origin is where Wallace can be found debating where Rayquaza is located, until the player gives him a hint that it is at Sky Pillar.
There is no Pokemon in the Cave of Origin in Pokemon Emerald.
how 2 get in the under warter cave on Pokemon emerald
north of sootopolis city
it is a cave
You can get a Groudon on Pokemon Emerald in Terra Cave.
Kyogre can be found in the Cave of Origins in Sapphire and the Marine Cave in Emerald.
In Pokemon Emerald, Groundon and Kyogre are legendary Pokemon. You can find them in the Marine Cave and the Terra Cave.